机译:John Cunningham Virus Status, Seroconversion Rate, and the Risk of Progressive Multifocal Leukoencephalopathy in Polish John Cunningham Virus-Seronegative Patients with Relapsing-Remitting Multiple Sclerosis
Med Univ Bialystok, Dept Neurol, Ul Sklodowskiej 24, PL-15276 Bialystok, Poland;
Francois COLLIN, Katowice, Poland;
Progressive multifocal leukoencephalopathy; Natalizumab; Multiple sclerosis;